I have...many times with many amps. Lots of A/B with my own sound board and set up in my basement sound studio. I've used all kinds of amps from Milbert tubes, to Krell ultra high end, including high end and very low end car amps such as Profile, and Pyramid....all the way up to zapco, audison, focal, and even a brax amp my friend brought over to test. He was very dissappointed that he couldn't tell the difference between the Profile and his Brax. well, at least it looks good, and impresses everyone!

 

i love what i have started

 

Time out at the very least. I need to go get more munchies and a coke before the show starts again.

 

so all amplifiers specs mean nothing, since they all sound the same correct

 

sorry but a decent damping factor is part of a good amplifier design whether or not you hear it

 

dont take it so personal. if there was 2 amplifiers with identical specs, except one had a damping of 5 and the other had a damping of 200 your not going to hear a difference. basically anything above a damping of 50 will have an inaudible difference unless your a canine.

the damping of 5 is just for example btw. basically every amplifier being made has a high enough damping factor that it cannot account for difference in sound.

 

*sigh*
Damping Factor:is a measure of a power amplifier's ability to control the back-emf motion of the loudspeaker cone after the signal disappears. The damping factor of a system is the ratio of the loudspeaker's nominal impedance to the total impedance driving it.
Which means that the Damping factor is directly related to the impedance presented to the amplifier, and the amplifier must control the speaker's motion, preventing inertia force from moving the voice coil any further than it should, if it does, audible loudspeaker distortion will occur, and the amplifier will be recieving more back EMF from the speaker.
So what's back EMF ??
Back-EMF(ElectroMotive Force): Occurrence in which a speaker driver continues moving, after the amplifier signal stops moving the voice coil back through the magnetic field and creating its own voltage which flows back to the amplifier and creates a flopping effect in the resulting sound.
To those of you that think it does not make a difference in sound may I offer a Q-Tip, or suggest a hearing test?
Thanks for the munchies and coke Rob ;-)

 

I know what is being referred to by the "loudspeaker's nominal impedance", but where does the "total impedance driving it" come from?

If a driver is a DVC 4 ohm, it has a nominal impedance of 4ohm + 4ohm (at least that's what it'll show on a spec sheet...) Depending on how the VC's are wired, you can either put a 2 or 8 ohm load on the amp. I've seen that higher loads result in greater damping factors. Yet I still don't know what the driving impedance would be.

All audible or non-audible arguments aside; what does an amp's damping factor indicate about the design/quality of the unit, if anything at all. Is there anything that can be assumed if amp 'A' has a DF of 250 @ 4 ohms, while amp 'B' has one of 100?

 

In Negative FeedBack design, where amplifier compares speaker's impedance vs. actual state(position in VC gap) and applies appropriate gain to control motion.

It would vary in accordance to frequency and voltage

If you "*** U ME" anything from this without using your ears then you end up in..,